GCF (HCF) of 13 and 42

"Greatest Common Factor" Calculator

What is the Greatest Common Divisor of 13 and 42?

Answer

GCF (HCF) of 13 and 42 is

Common factors: 1

Only 1 divides both: 13 and 42 share no prime factor.

Such numbers are called coprime (relatively prime); their LCM is just the product: 13 × 42 = 546.

13 — prime

42 = 2 × 3 × 7

Prime	13	42	Lowest power
2	—	2	—
3	—	3	—
7	—	7	—
13	13	—	—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 1

More with these numbers

Related Calculations

GCF Table

Number 1	Number 2	GCF
13	20	1
13	21	1
13	22	1
13	24	1
13	25	1
13	26	13
13	27	1
13	29	1
13	30	1
13	31	1
13	32	1
13	34	1
13	35	1
13	36	1
13	37	1
13	38	1
13	39	13
13	41	1
13	42	1
13	45	1
13	46	1
13	47	1
13	48	1
13	50	1
13	52	13
13	55	1
13	56	1
13	58	1
13	60	1
13	65	13

FAQ

What is the Greatest Common Divisor of 13 and 42?

GCF (HCF) of 13 and 42 is 1

How to find the GCF of 13 and 42?

You can find the GCF of 13 and 42 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 13 and 42 is 1.

What prime factors do 13 and 42 share?

13 and 42 have no prime factor in common, so the only integer that divides both of them is 1 and their GCF is 1.

How does the GCF reduce the fraction 13/42?

Divide the numerator and the denominator by the GCF 1: 13 ÷ 1 = 13 and 42 ÷ 1 = 42. So 13/42 in lowest terms is 13/42.

Are 13 and 42 coprime?

Yes, 13 and 42 are coprime (relatively prime) because their Greatest Common Factor is 1.

GCF (HCF) of 13 and 42

What is the Greatest Common Divisor of 13 and 42?

More with these numbers

Related Calculations

See Also

GCF Table

FAQ

What is the Greatest Common Divisor of 13 and 42?

How to find the GCF of 13 and 42?

What prime factors do 13 and 42 share?

How does the GCF reduce the fraction 13/42?

Are 13 and 42 coprime?

See Also

Number 1	Number 2	GCF
13	20	1
13	21	1
13	22	1
13	24	1
13	25	1
13	26	13
13	27	1
13	29	1
13	30	1
13	31	1
13	32	1
13	34	1
13	35	1
13	36	1
13	37	1
13	38	1
13	39	13
13	41	1
13	42	1
13	45	1
13	46	1
13	47	1
13	48	1
13	50	1
13	52	13
13	55	1
13	56	1
13	58	1
13	60	1
13	65	13

Number 1	Number 2	GCF
13	20	1
13	21	1
13	22	1
13	24	1
13	25	1
13	26	13
13	27	1
13	29	1
13	30	1
13	31	1
13	32	1
13	34	1
13	35	1
13	36	1
13	37	1
13	38	1
13	39	13
13	41	1
13	42	1
13	45	1
13	46	1
13	47	1
13	48	1
13	50	1
13	52	13
13	55	1
13	56	1
13	58	1
13	60	1
13	65	13

Number 1	Number 2	GCF
13	20	1
13	21	1
13	22	1
13	24	1
13	25	1
13	26	13
13	27	1
13	29	1
13	30	1
13	31	1
13	32	1
13	34	1
13	35	1
13	36	1
13	37	1
13	38	1
13	39	13
13	41	1
13	42	1
13	45	1
13	46	1
13	47	1
13	48	1
13	50	1
13	52	13
13	55	1
13	56	1
13	58	1
13	60	1
13	65	13